Should I use multiple workspaces or single with document sets

I am building a custom meeting workspace to use for several meetings that occur in about 8-10 departments. Each department further has an average of 15 meetings occurring at different intervals.

I need an expert opinion as to whether I should have one meeting workspace per department and maybe use document sets for each meeting OR should I rather use a new meeting workspace for each meeting. The latter approach would mean I potentially have 20-30 workspaces for each department in a year at least.

Maybe can I have pointers as to best practice if possible :)

Thanks!

Chester